学生教务管理系统是一个用于管理学生信息、课程信息和成绩的系统。以下是一个简单的Python实现：
```python
class Student:
def __init__(self, name, age, gender):
self.name = name
self.age = age
self.gender = gender
class Course:
def __init__(self, name, credits):
self.name = name
self.credits = credits
class Grade:
def __init__(self, student, course, score):
self.student = student
self.course = course
self.score = score
class StudentCourseGradeManager:
def __init__(self):
self.students = []
self.courses = []
self.grades = []
def add_student(self, student):
self.students.append(student)
def add_course(self, course):
self.courses.append(course)
def add_grade(self, grade):
self.grades.append(grade)
def get_students(self):
return self.students
def get_courses(self):
return self.courses
def get_grades(self):
return self.grades
# 示例
manager = StudentCourseGradeManager()
manager.add_student(Student("张三", 20, "男"))
manager.add_course(Course("计算机科学", 4))
manager.add_grade(Grade(manager.students[0], manager.courses[0], 95))
print(manager.get_students())
print(manager.get_courses())
print(manager.get_grades())
```
这个简单的学生教务管理系统包含三个类：`Student`、`Course`和`Grade`。`StudentCourseGradeManager`类负责管理学生、课程和成绩。你可以使用`add_student`、`add_course`和`add_grade`方法添加学生、课程和成绩，然后通过`get_students`、`get_courses`和`get_grades`方法获取所有学生、课程和成绩。
